I am using leftBarButtonItems to group a negativeSeparator (to get rid of padding and align my custom button to the edge of the screen) and a custom UIBarButtonItem:
[navigationItem setLeftBarButtonItems:@[negativeSeperator, leftButton]];
How do I make my custom leftButton function as a backBarButtonItem? I understand that as soon as I use leftBarButtonItems, it hides/replaces the backBarButtonItem. So, how can I "transfer" the back button functionality to my custom button?
Set the action to the leftBarButton item you are placing on the navigationBar and add the below code in that action method
[self.navigationController popViewControllerAnimated:YES];